Understanding how marine fish early-life history is affected in the long-term by environmental and oceanographic factors is fundamental given its importance to population dynamics and connectivity. This work aimed at determining the influence of these processes on the interannual variability in hatch day and early-life growth patterns of European seabass, over a seven-year period (2011 to 2017) in the Atlantic Iberian coast. To accomplish this, otolith microstructure analysis was used to determine seabass hatch day and to develop early-growth correlations. In most years, hatching occurred from February to April, with two exceptions: in 2012, hatching started in early-January, and in 2016 an exceptionally long hatching period was registered. Using generalized additive models (GAM), we observed that sea surface temperature (SST), the North Atlantic Oscillation index (NAOi) and Chlorophyll-a (Chla) were the main drivers behind the inter-annual variability in seabass hatch day. Analysis of correlations between growth increments allowed assessing important periods of seabass growth and how future growth is affected. Since seawater temperature is among the main drivers for seabass recruitment and growth, its life cycle may be hampered due to ocean warming and an increasingly unstable climate, with consequences for the natural marine stocks and their harvest.

鉴于其对种群动态和连通性的重要性，了解长期受环境和海洋因素影响的海水鱼类早期生存历史是至关重要的。这项工作旨在确定这些过程对大西洋伊比利亚沿岸七年期（2011年至2017年）孵化日的年际变化和欧洲海鲈早期生命增长模式的影响。为此，使用耳石微结构分析来确定鲈鱼的孵化日并建立早期生长的相关性。在大多数年份中，孵化发生在2月至4月，但有两个例外：2012年，孵化于1月初开始，而2016年则经历了异常长的孵化期。使用广义加性模型（GAM），我们观察到海表温度（SST），北大西洋涛动指数（NAOi）和叶绿素-a（Chla）是雪鱼孵化日年际变化的主要驱动力。通过对增长增量之间的相关性进行分析，可以评估鲈鱼生长的重要时期以及未来的增长受到怎样的影响。由于海水温度是海鲈招募和生长的主要驱动力之一，因此，由于海洋变暖和日益不稳定的气候，其生命周期可能会受到阻碍，从而影响了自然海洋资源及其捕捞量。